:root {
    --background-color: #2c3e50;
    --border-color: #7591AD;
    --text-color: #34495e;
    --color1: #EC3E27;
    --color2: #fd79a8;
    --color3: #0984e3;
    --color4: #00b894;
    --color5: #fdcb6e;
    --color6: #e056fd;
    --color7: #F97F51;
    --color8: #BDC581;
}

* {
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
}

body {
    width: 100vw;
    height: 100vh;
    background-color: var(--background-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Montserrat', sans-serif, Arial, 'Microsoft Yahei';
}

.channel {
    position: absolute;
    width: 80%;
    text-align: center;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -200px);
    font-size: 30px;
    font-weight: bold;
    color: #fff;
}

.container {
    width: 500px;
    height: 100px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bt {
    position: relative;
    width: 60px;
    height: 60px;
    /* background-color: #00b894; */
    display: flex;
    justify-content: center;
    align-items: center;
}

.bt::after,
.bt::before {
    position: absolute;
    content: '';
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color4);
    opacity: 0;
    transition: 0.3s;
}

.bt::after {
    border-width: 2px 0px 2px 0px;
}

.bt::before {
    border-width: 0px 2px 0px 2px;
}

.bt:hover::after {
    transform: skewY(30deg);
    opacity: 1;
}

.bt:hover::before {
    transform: skewX(-30deg);
    opacity: 1;
}

.icon {
    font-size: 40px !important;
    color: var(--color4);
    transition: 0.4s;
}

.bt:hover .icon {
    font-size: 30px !important;
}